Why hamsters spin in circles?

Answer 1

Do not listen to the joke ` because they spin in squares` because if they are spinning in circles it is very serious. read this passage I got from roborovskihamsters.com:

Some bloodlines seem to produce individuals wich `spin` it is still unknown what causes this affliction (some might say it might be a cause of inbreeding,but there is no evidence of it).There is no complete cure as it is a congenital neuraoligical disorder,but you can releive the symptoms in some cases. The cage mates of a spinning robo can get stressed an d irritated by the company of an uncontrolable spinning individual. The spinner might be more susceptible to attacks and may find it difficult to find any rest.It can worsen due to stress and excitement, so creating a safe ( no level cage) and quiet environment for the spinning robo might reduce the spinning and enable the hamster to lead a relatirely normal life.It is very strongly advised not to breed from such individuals as the defeat might not pop up in later bloodlines most possibly in a worse form.The spinning defect is found in white-faced roborovskis.